diff --git a/contrib/ldns/dnssec_sign.c b/contrib/ldns/dnssec_sign.c
index 2e5a7a92e15c..abce4852d3f4 100644
--- a/contrib/ldns/dnssec_sign.c
+++ b/contrib/ldns/dnssec_sign.c
@@ -771,9 +771,6 @@ ldns_dnssec_zone_create_nsecs(ldns_dnssec_zone *zone,
 }
 
 #ifdef HAVE_SSL
-/* in dnssec_zone.c */
-extern int ldns_dname_compare_v(const void *a, const void *b);
-
 static ldns_status
 ldns_dnssec_zone_create_nsec3s_mkmap(ldns_dnssec_zone *zone,
 		ldns_rr_list *new_rrs,
diff --git a/contrib/ldns/ldns/dname.h b/contrib/ldns/ldns/dname.h
index 16b45429fb21..291786ba88fb 100644
--- a/contrib/ldns/ldns/dname.h
+++ b/contrib/ldns/ldns/dname.h
@@ -150,6 +150,7 @@ bool ldns_dname_is_subdomain(const ldns_rdf *sub, const ldns_rdf *parent);
  * \return -1 if dname1 comes before dname2, 1 if dname1 comes after dname2, and 0 if they are equal.
  */
 int ldns_dname_compare(const ldns_rdf *dname1, const ldns_rdf *dname2);
+int ldns_dname_compare_v(const void *, const void *);
 
 /**
  * Checks whether the dname matches the given wildcard